Django admin site not working

[melsebaey@…]

Hi,
I'm a new user for django, I started using the tutorial for ver 1.4 with python 2.7.1 on mac 10.7.3
when i try to open the admin site it' gives me the following error

DoesNotExist at /admin/
Site matching query does not exist.
Request Method:	GET
Request URL:	http://127.0.0.1:8000/admin/
Django Version:	1.4
Exception Type:	DoesNotExist
Exception Value:	
Site matching query does not exist.
Exception Location:	/Library/Python/2.7/site-packages/Django-1.4-py2.7.egg/django/db/models/query.py in get, line 366
Python Executable:	/usr/bin/python
Python Version:	2.7.1
Python Path:	
['/Users/mohammedelsebaey/a/mysite1',
 '/Library/Python/2.7/site-packages/Django-1.4-py2.7.egg',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC',
 '/Library/Python/2.7/site-packages']
Server time:	Sun, 15 Apr 2012 07:08:37 -0500

This is the installed applications part in the settings.py

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'polls',
    # Uncomment the next line to enable the admin:
     'django.contrib.admin',
    # Uncomment the next line to enable admin documentation:
     #'django.contrib.admindocs',
)

and this is the urls.py

from django.conf.urls import patterns, include, url

# Uncomment the next two lines to enable the admin:
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'mysite1.views.home', name='home'),
    # url(r'^mysite1/', include('mysite1.foo.urls')),

    # Uncomment the admin/doc line below to enable admin documentation:
    # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),

    # Uncomment the next line to enable the admin:
    url(r'^admin/', include(admin.site.urls)),
)

thanks

[Aymeric Augustin]

If you need help using Django, please see TicketClosingReasons/UseSupportChannels.

[Karen Tracey]

Please follow the link above to find appropriate places to get help with resolving this issue. This is not a bug in Django, and Trac is not the right place to be asking for help. Also please use WikiFormatting and preview before posting so that your report can be read properly.